Apparatus to test the resistence to vibration of brake beams for railway car truck assemblies

Abstract

This invention relates to an apparatus to test the resistance to vibration of brake beams for railway car truck assemblies having a union frame, a side frame at each end of the union frame, each having front and rear ends, and a pair of beam carriers, each having front and side end as well as a receptacle in each of its ends to receive a side guide of a pair of brake beams. A pair of vibratory devices, each mounted on the front end of the respective beam carriers, are coupled through a transmission to a driver providing a rotatory movement for testing. The union frame, side frames and beam carriers which support a pair of brake beams to be tested, reproducing a railway car truck assembly.

What is claimed is: 
     
       1. Vibration generating equipment for use in testing brake beams for railway car truck assemblies under conditions simulating conditions encountered on railroad tracks, comprising in combination: an assembly for simulating a railway car truck assembly with a pair of brake beams (54, 54') mounted at opposite ends into beam carriers (36, 36') extending from the ends of a bolster (26), and a set of two independently operable vibrators (60, 60') coupled to the respective beam carriers (36, 36') for imposing vibratory movement at the opposite ends of the brake beams.   
     
     
       2. The equipment of claim 1 wherein said beam carriers further comprise retaining channels (46, 46') for supporting guide members (50, 50') at opposite ends of the brake beams (54, 54'), said channels being disposed diagonally to a plane passed through said brake beams (54, 54'), and means mounting said vibrations (60, 60') at one end of the respective beam carriers (36, 36'). 
     
     
       3. The equipment of claim 1 wherein said vibrators (60, 60') further comprise respective sets of eccentrically mounted disks (82, 84, 86, and 82', 84', 86') and means (62, 62') for rotating the discs.